Programmed I/O vs interrupt-driven I/O in Operating Systems - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the sentence to describe Programmed I/O.

Operating Systems

In Programmed I/O, the CPU [1] the device status continuously to check if it is ready.

Drag options to blanks, or click blank then click option'

Apolls

Bignores

Cinterrupts

Dsleeps

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing polling with interrupts.

Thinking the CPU sleeps while waiting.

Programmed I/O uses polling, where the CPU repeatedly checks the device status.

2fill in blank

medium

Complete the sentence to describe interrupt-driven I/O.

Operating Systems

In interrupt-driven I/O, the device [1] the CPU when it is ready to transfer data.

Drag options to blanks, or click blank then click option'

Aignores

Bpolls

Cinterrupts

Dwaits

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up who initiates communication.

Thinking the CPU polls in interrupt-driven I/O.

Interrupt-driven I/O uses interrupts where the device signals the CPU when ready.

3fill in blank

hard

Fix the error in the statement about CPU usage in Programmed I/O.

Operating Systems

Programmed I/O is inefficient because the CPU [1] while waiting for the device.

Drag options to blanks, or click blank then click option'

Asleeps

Binterrupts

Cignores

Dpolls

Attempts:

3 left

💡 Hint

Common Mistakes

Saying the CPU sleeps or ignores the device.

Confusing polling with interrupts.

The CPU wastes time polling the device repeatedly, making Programmed I/O inefficient.

4fill in blank

hard

Fill both blanks to complete the comparison between Programmed I/O and interrupt-driven I/O.

Operating Systems

Programmed I/O uses [1] to check device status, while interrupt-driven I/O uses [2] to notify the CPU.

Drag options to blanks, or click blank then click option'

Apolling

BDMA

Cinterrupts

Dbuffers

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing DMA with interrupts.

Mixing polling and buffering concepts.

Programmed I/O uses polling; interrupt-driven I/O uses interrupts to signal the CPU.

5fill in blank

hard

Fill all three blanks to complete the dictionary describing I/O methods.

Operating Systems

io_methods = {"Programmed I/O": "CPU [1] device status", "Interrupt-driven I/O": "Device [2] CPU", "DMA": "Direct data transfer without [3] CPU intervention"}

Drag options to blanks, or click blank then click option'

Apolls

Binterrupts

Cconstant

Dbuffers

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up who polls and who interrupts.

Misunderstanding DMA's role.

Programmed I/O: CPU polls device status.
Interrupt-driven I/O: Device interrupts CPU.
DMA: Direct data transfer without constant CPU intervention.